Which is an example of something we can do to help keep the carbon cycle in balance? O A. Drive our cars more.

O B. Turn off the lights when we leave a room.

O C. Cut down more trees for lumber and paper.

O D. Build more coal-burning power plants.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

a. the production of carbon dioxide through the process of photosynthesis

d) center of the mid-ocean ridge

give brainleysest

sinserly,

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